I've tested both finnish and swedish dictionarys.
Both work swedish a little bit better (finnish is a difficult language).

I have a couple of "problems", when you use prepositions in swedish, e.g. är (are) is almost the last in the row ,br,ar, as, and ap comes before that, is it possible to change order of some words that are used more often? (I've tried to edit swedish.idc file in notepad, but it didn't work out nicely)

The second problem I had was, when I wanted to add a new word I used HW qwerty, it still writes the words wrong way... BUT if I change first in fastsms to qwerty and then add a word with HW qwerty it works good
Also if you choose Abc in fastsms, it wont write with Capital letter, still uses all non-capital